ci: use shared cargo publish action

[dev-jodee]

Summary

• Replace inline Rust client publishing logic with the shared cargo-publish action.
• Keep repo-specific release tests, client generation, tags, GitHub releases, and summaries in this workflow.
• Pin the workflow to the merged upstream github-actions commit e2cd34eb09f996b48be7f6daeb8f455094dd6d53.

Test Plan

• ruby -e 'require "yaml"; YAML.load_file(".github/workflows/publish-rust.yml"); puts "workflow yaml ok"'
• Subscriptions pre-push format and lint checks passed.
• Dry-run publish workflow passed: https://github.com/solana-program/subscriptions/actions/runs/26289058647

Notes

• Replaces closed PR ci: use shared cargo publish action #129 after renaming the branch from hotfix/do-not-merge-test-cargo-publish-action to ci/use-shared-cargo-publish-action.
• Depends on merged github-actions PR: feat: add cargo publish action solana-developers/github-actions#15

[vercel]

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Project	Deployment	Actions	Updated (UTC)
solana-subscriptions-program	Ready	Preview, Comment	May 22, 2026 3:18pm

[github-actions]

Compute Unit Report

Instruction	Samples	Min CUs	Max CUs	Avg CUs	Est Cost (Low) [SOL]	Est Cost (Med) [SOL]	Est Cost (High) [SOL]
cancel_subscription	22	1720	2030	1919	0.000005000	0.000005076	0.000005959
close_subscription_authority	7	1803	1833	1807	0.000005000	0.000005072	0.000005903
create_fixed_delegation	38	3509	11042	4803	0.000005001	0.000005192	0.000007401
create_plan	96	3436	13949	5126	0.000005001	0.000005205	0.000007563
create_recurring_delegation	27	3533	11038	4762	0.000005001	0.000005190	0.000007381
delete_plan	9	359	359	359	0.000005000	0.000005014	0.000005179
init_subscription_authority	153	6226	21226	9393	0.000005002	0.000005375	0.000009696
resume_subscription	3	1723	1723	1723	0.000005000	0.000005068	0.000005861
revoke_delegation	19	255	519	353	0.000005000	0.000005014	0.000005176
subscribe	32	6473	16973	8167	0.000005002	0.000005326	0.000009083
transfer_fixed	6	5208	9711	6710	0.000005002	0.000005268	0.000008355
transfer_recurring	17	5323	11413	7914	0.000005002	0.000005316	0.000008957
transfer_subscription	10	5533	8572	6327	0.000005001	0.000005253	0.000008163
update_plan	22	424	503	477	0.000005000	0.000005019	0.000005238

Generated: 2026-05-22